<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <meta name="viewport"
          content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no"/>
    <style>
        #dv4{
            width: 100px;
            height: 50px;
        }
    </style>

</head>
<body>
<div id="dv1">我是dv1普通css</div>
<div id="dv2">我是dv2 scss</div>
<div id="dv3">我是dv3 less</div>
<div id="dv4">我是dv4 url</div>
<div id="app"></div>
</body>
</html>